Similarities and differences between barcode technology and RFID technology.UHF Cards RFID manufactu

　　Similarities and differences between barcode technology and RFID technology

　　Radio Frequency Identification Technology RFID (Radio Frequecy Identification), commonly known as electronic tags. RFID is a non-contact automatic identification technology, which is mainly used to establish unique identification for various items, and is an important supporting technology for the Internet of Things.

　　Radio Frequency Identification Technology RFID

　　The RFID system consists of: electronic tags, readers (readers), and computers as servers. Among them, the electronic tag contains an RFID chip and an antenna. Its working principle is that when the user uses the reader to operate the electronic tag on the item, the reader antenna sends an electromagnetic signal to the tag, communicates with the tag, the RFID code in the tag is transmitted back to the reader, and the reader communicates with the system. The server conducts a dialogue and queries the description information of the item according to the code.

　　The working principle of RFID system

　　RFID tags are divided into active and passive tags. Active tags are powered by batteries, and the distance from the reader can reach more than 10m during operation, but the cost is high and there are few applications; passive tags are mostly used in practical applications. The power is supplied by extracting energy from the electromagnetic field emitted by the reader, and the distance from the reader is about 1m during operation.

　　Barcode Technology VS RFID

　　Barcode technology and RFID technology are called the item ID card in the Internet of Things era, because they can be used to store the information of the item, and can represent the identity of the item to a certain extent, but RFID stores more information and can be used as the only item of the item. Identity. In addition, there are many differences between the two:

　　(1) The barcode does not have the function of reading and writing, and no information can be added to the printed barcode; the RFID tag can be read and written, and the RFID reader can exchange information with the tag, and modify the stored information within the scope of the label design.

　　(2) The barcode reader needs to perform close-range alignment reading of the printed barcode, and the barcode only supports close-range reading; the RFID tag supports a longer reading distance, and the RFID reader does not need to read active RFID tags or Passive RFID tags for close alignment reading.

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